text: #include	"plan9.h"
  #include	"fcall.h"
  
  int
  statcheck(uchar *buf, uint nbuf)
  {
  	uchar *ebuf;
  	int i;
  
  	ebuf = buf + nbuf;
  
  	buf += STATFIXLEN - 4 * BIT16SZ;
  
  	for(i = 0; i < 4; i++){
  		if(buf + BIT16SZ > ebuf)
  			return -1;
  		buf += BIT16SZ + GBIT16(buf);
  	}
  
  	if(buf != ebuf)
  		return -1;
  
  	return 0;
  }
  
  static char nullstring[] = "";
  
  uint
  convM2D(uchar *buf, uint nbuf, Dir *d, char *strs)
  {
  	uchar *p, *ebuf;
  	char *sv[4];
  	int i, ns;
  
  	p = buf;
  	ebuf = buf + nbuf;
  
  	p += BIT16SZ;	/* ignore size */
  	d->type = GBIT16(p);
  	p += BIT16SZ;
  	d->dev = GBIT32(p);
  	p += BIT32SZ;
  	d->qid.type = GBIT8(p);
  	p += BIT8SZ;
  	d->qid.vers = GBIT32(p);
  	p += BIT32SZ;
  	d->qid.path = GBIT64(p);
  	p += BIT64SZ;
  	d->mode = GBIT32(p);
  	p += BIT32SZ;
  	d->atime = GBIT32(p);
  	p += BIT32SZ;
  	d->mtime = GBIT32(p);
  	p += BIT32SZ;
  	d->length = GBIT64(p);
  	p += BIT64SZ;
  
  	d->name = nil;
  	d->uid = nil;
  	d->gid = nil;
  	d->muid = nil;
  
  	for(i = 0; i < 4; i++){
  		if(p + BIT16SZ > ebuf)
  			return 0;
  		ns = GBIT16(p);
  		p += BIT16SZ;
  		if(p + ns > ebuf)
  			return 0;
  		if(strs){
  			sv[i] = strs;
  			memmove(strs, p, ns);
  			strs += ns;
  			*strs++ = '\0';
  		}
  		p += ns;
  	}
  
  	if(strs){
  		d->name = sv[0];
  		d->uid = sv[1];
  		d->gid = sv[2];
  		d->muid = sv[3];
  	}else{
  		d->name = nullstring;
  		d->uid = nullstring;
  		d->gid = nullstring;
  		d->muid = nullstring;
  	}
  	
  	return p - buf;
  }
  